A:蛋白质和脂肪
B:脂质和蛋白质
C:蛋白质和固醇
D:磷脂和蛋白质
下列实验操作正确的是( )
Travelling to London
We think ⑴ is the best season to visit England.
We did most of our sightseeing(观光) ⑵ .
The best part of the trip was going to the theatre.
We don't think the English food is very ⑶ .
人类早期的文明最早诞生在亚非的大河流域。右图是哪个古代文明的发源地( )